# int 类型
# 定义一个整数变量
age = 25

# 打印变量的值
print("Age:", age)

# 进行一些基本的数学运算
new_age = age + 1
print("New Age:", new_age)

# 判断年龄是否大于等于30
if age >= 30:
    print("You are at least 30 years old.")
else:
    print("You are under 30 years old.")
